Carburetor



C. L. LEVEQUE CARBURETR Filed July 30, 1926 2 Sheets-Sheet 1 I N VEN TOR.

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v ATTORNEY.

Nov. 13, 1928.

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Nov. 13, 1928. 1,691,487

c. l.. LEVI-:QUE

CARBURETOR Filed July :5o. 192e 2 sheets-Shen 2 I N VEN TOR.

BY @JQ/JMW ZMW/ W Patented Nov., 13, 1928.

CHARLES LoUIsLEvEQUE, or DETROIT, MICHGAN.

CARnUnEToR;

eppue'at'ion fuearuiyeo, 1926. serialv No. 125,842.

My invention relates" to improvements iny carburetor-s. Y y The Objectis -to provide a'v carburetor of simple construction" vadapted to efficiently' operate to provideth'e combustion' chamber with Whichit 'is associated with' the required amount of fuelV mixture properly propor-y tioned to serve in the most satisfactory manner atv all times* the needsoftlieengme'- An additional object is to provide such af carburetorso constructed and arranged that fuel1 is fed to' a normally closed fuel nozzle Within the mixing chamber thereof, the outlet from which fuel nozzle is regulated by a valve fromvvhiclr the! fuelv is discharged into the niix-ingi chamber' througn restricted passagewayv encirclingl a por-tionl of vsaid valve,v which passageway is normally opened to the suctio'nf Within the mixing chamber.

A; meritoriousfcatureof my inventit'in'A is the provision' of a` carburetor" such"r asI is herein'described wherein a nozzle Well carrying' a controlvalve is disposed Within theI mixing chamber and isi so` supported' by a removable portion ofA the Wall of the' mix'- ing chamber asf to be' capable' of .ready re-V moval therewith for inspection or cleaning.

An additional object of merit is the provision in a carburetor ofthe' character described provided with a` fuel nozzle' as hereinabove setl fort-h with al mixingY chamber provided with an: aivrf inlet and: a fuel mixturel outlet controlled' byv a barrel throttle,A the movement. ofwvhich is coordinated; with theV movement of the fuel valve' controlling the outlet of .the fuel nozzle.

My improvedparburetor is ofil suchra charactor that the lloat chamber ordinarily provided in carburetor construction is dispensed with and the fuel inletf tothe mixing: cham*- ber leads directly from` the provided source of fuel .supply to the fuell nozzle disposed Within the mixing chamberandA the control fuel. The admission of air to the mixing chamber, and the discharge of the fuelmixture from the mixingv chamber is regulated manually by operator.

Other meritorious features of my carburetor construction and advantages thereof Will more fully appear from the?. following specification descriptive of the lillustrative Online 242201? Figi 1.

embodiment shown in the accompanyingr drawings and definedy in the appended claim.

In the drawings:

Fig. 1 isa plan of my improved car. buretor.

Fig.- 2A is a vertical sectional view ta'ken Fig. 3 isl a cross-sectional vievs7 taken on line of Fig.' 2.

Fig.' 4 is ya cross-sectional view takexron line 4"-4 of Fig. 2.

Fig-5' is a perspective'of a portion of the operating mechanism.

F 1g. 6 rs a perspective of the barrel throttle.

My improved carburetor is adapted to be usedin connectiony With internal' combustion-engines such as are vcommonly employedl in automobile construction" andis connected? up in the'usualmannery with thefcombustion` chambers and With a suitable source'offuelsupply7 which auxiliary connections are not shown' in the drawings as lthey form no part ofmy inventiolif c' Myinvention relatesto the improved carburetor design. In the dravving,-10 indi cates a mixing chamber'having a fuel mixtureoutlet 12.y and ar`1` air inlet 14. This mixing chamber has a screw cap 16 at' one end which is cut away asv at 1'8,y Which openings 18 are controlled byan-adjustable screwplate QO'having a knurled` periphery and carryingl a locking device QQ'vvhicli engagesY inl a similarly knurled periphery formed onv the cap V16 to holdthe plate at adjusted positions with respect-to said cap to regulate the openings 18 through the cap.

The mixinfr chamber has a removable Wall plate 9A held thereon in a suitable mannerandr it is here shown as secured ini place b'y screws 26', Which' Wall portion carriesa fuel nozzleQS that has alk fuelinlet 30 leading yto a conduit 32 which'y .extends to ,a suitable source of4 fuel supply now shown in the drawings. This fuel nozzle is tubular i'n shape and is-'provided with an end closure 34: at one end and a cap 36 at the opposite end, Which `cap has a discharge-outlet 38. A valve ,40 is'located Within the nozzle. This valve has a beveled portion- 42 adapted to into the interior of the mixing chamber 'pau above the cap 86. rlhis 'stern is of ysuch a size that it is spaced from the wall ofthe outlet of the cap a limited distance providing a restricted fuel discharge passageway through said cap about said stem, which passageway is open to the suction in the mixing chamber.

A barrel throttle indicated in assembly as 50. in Fig. 6 is disposed within the mixing chamber as shown in Fig. 2. vThis barrell throttle is provided with an aperture 52 adapted to register with the fuel mixture outlet 12 from the mixing chamber andwith an aperture 54 adapted to register with the air intake 14 into the mixing chamber and with a slotted portion 56 adapted to permit rotatable movement of the barrel with respect to the conduit 30 leading to the fuel nozzle 28.

The barrel throttle is adapted to be rotated to regulate the air inletopening in the mixing chamber and the fuel discharge opening therefrom and an operating connection is provided to actuate said barrel throttle.

This operating connection also serves to open the valve 40 within 'the fuel nozzle. The operating connection above referred to is extended to a suitable point to be conveniently controlled by' the operator. The mixing chamber is provided at the upper end with an extension 56. Within this extension is fixed a tubular bearing 58. Rotatably supported within this tubular bearing is a portion 60. This portion 6() carries a yoke 62 from which projects an arm 64 adapted to be coupled with a suitable, manually operable connection not shown. The swinging of the arm in one-direction or the other swings the yoke and rotates the portion 60. A spindle 66 is threaded into the portion 60. This spindle terminates at the upper end in a head 68 adapted to be engaged to actuate the spindle. An indicator 70 is carried by the spindle. The arm 64 is provided with an arcuate face portion 72 graduated to register the movement of the indicator. Y0. The spindle 66 extends through the tubular portion 60'into the barrel throttle 50 and into Lngagement with the end of the valve stem The end of the barrel throttle is cut away as at 74and the spindle 66 is provided with an integral plate portion 76, receivable within the opening 74 so that upon rotation of in the bearing 58 and carries with it the spindle 66 and a barrel throttle is'rotatedv to open or close the openings 12 and 14 into the mixing chamber. Bearing 58 is provided cn its lower face with a cam surface 7 8, terminating in a shoulder 80. This cam surface engages the plate 7 6 as there is provided an expansion spring 82 shown in F ig. 2.v As the plate 76 is rigidly secured to the spindle 66 and is held by the spring 82 against the cam face 78 of the bearing 58, rotation of thespindle will serve to actuate the same axially, thereby actuating the valve member 40. It will therefore appear that rotation-of the spindle will rotate the barrel throttle to regulate the openings controlled thereby and will also actuate the fuel valve within the fuel nozzle to regulate the opening controlled thereby, yet the spindle 66 may be adjusted by engagement of the head 68 axially to adjust the permitted opening of the valve 40 without varying theposition of the barrel throttle 50. j lt will therefore appear that the air inlet opening to the mixing chamber, the fuel mixture outlet therefrom, and the fuel nozzle valve within the nozzle are cojointly regulated through the swinging of the arm 64 to open and close said valved openings in any direction proportioned to each other and -that the fuel valve opening may be adjusted independently of the operation of the barrel throttle.

Upon the opening of the valves to admit fuel mixture to the combustion chambera film of fuel is drawn through the annular passageway in the outlet 38 about the valve stem 48 into the mixingy chamber where it mixes with the air entering the same and the mixture iscarried through the outlet 12. The vaporization of the fuel is unusually eflicient. The entire device is subject to a single control. The fuel nozzle being supported by the removable wall plate 24 is readily removable from the mixing chamber for inspection or cleaning. Y

A stop, in the form of a screw member 84, is provided. This vstop 84 is threaded through the wall of the casing 10 and projects into a slot 86 formed in the barrel 50 which limits the rotation of the barrel and prevents the same from dropping out of the lcasing upon removal of the end plate 16.

What I claim is: f

In a carburetor, a mixing chamber having a fuel mixture outlet opening and an air inlet opening, a barrel throttle rotatably mounted within said mixing chamber *controlling said openings, a fuel nozzle in said chamber, a valve mounted within said nozzle and held yieldingly upwardly by a spring to olose the outlet of the nozzle, said valve provided with a stem extending upwardly through the nozzle outlet into the interior of the mixing chamber, a rotatably operable axially movable member extending through the top of the barrel throttle into engagement with the end of said valve stem, said barrel throttle coupled with a part on the operating member to rotate with said member while permitting relative axial movement of the operating member therethrough,

said operating cam faoe whereby upon ro tation of said member relative to said cam face, the operating member is moved axially against the resistance of said spring to depress the valve stem and the valve.

In testimony whereof, I sign this speoiication.

CHARLES .LOUISY LEVEQUE. 

